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Returns the input buffered by a given distance. If the distance is positive, the geometry is expanded, and if the distance is negative, the geometry is contracted.
Usage
Returns
MultiLineString.buffer(distance, maxError, proj)
Geometry
Argument
Type
Details
this: geometry
Geometry
The geometry being buffered.
distance
Float
The distance of the buffering, which may be negative. If no projection is specified, the unit is meters. Otherwise the unit is in the coordinate system of the projection.
maxError
ErrorMargin, default: null
The maximum amount of error tolerated when approximating the buffering circle and performing any necessary reprojection. If unspecified, defaults to 1% of the distance.
proj
Projection, default: null
If specified, the buffering will be performed in this projection and the distance will be interpreted as units of the coordinate system of this projection. Otherwise the distance is interpereted as meters and the buffering is performed in a spherical coordinate system.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[[["\u003cp\u003e\u003ccode\u003ebuffer\u003c/code\u003e returns a Geometry representing the input MultiLineString expanded or contracted by a specified distance.\u003c/p\u003e\n"],["\u003cp\u003eA positive distance expands the geometry, while a negative distance contracts it.\u003c/p\u003e\n"],["\u003cp\u003eThe distance is in meters unless a projection (\u003ccode\u003eproj\u003c/code\u003e) is specified, in which case the distance is in the units of the projection's coordinate system.\u003c/p\u003e\n"],["\u003cp\u003eOptional parameters allow controlling the error margin (\u003ccode\u003emaxError\u003c/code\u003e) for the buffer operation and the projection used.\u003c/p\u003e\n"]]],["The `buffer` method expands or contracts a geometry by a specified distance. A positive distance expands the geometry, while a negative distance contracts it. The distance unit is meters by default, or it can be set by the user using projection. The user can also set the maximum error margin to use while computing the buffer. The method returns the buffered geometry.\n"],null,["# ee.Geometry.MultiLineString.buffer\n\nReturns the input buffered by a given distance. If the distance is positive, the geometry is expanded, and if the distance is negative, the geometry is contracted.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------------------------------------------------|----------|\n| MultiLineString.buffer`(distance, `*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry being buffered. |\n| `distance` | Float | The distance of the buffering, which may be negative. If no projection is specified, the unit is meters. Otherwise the unit is in the coordinate system of the projection. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when approximating the buffering circle and performing any necessary reprojection. If unspecified, defaults to 1% of the distance. |\n| `proj` | Projection, default: null | If specified, the buffering will be performed in this projection and the distance will be interpreted as units of the coordinate system of this projection. Otherwise the distance is interpereted as meters and the buffering is performed in a spherical coordinate system. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiLineString object.\nvar multiLineString = ee.Geometry.MultiLineString(\n [[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);\n\n// Apply the buffer method to the MultiLineString object.\nvar multiLineStringBuffer = multiLineString.buffer({'distance': 100});\n\n// Print the result to the console.\nprint('multiLineString.buffer(...) =', multiLineStringBuffer);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiLineString,\n {'color': 'black'},\n 'Geometry [black]: multiLineString');\nMap.addLayer(multiLineStringBuffer,\n {'color': 'red'},\n 'Result [red]: multiLineString.buffer');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a MultiLineString object.\nmultilinestring = ee.Geometry.MultiLineString([\n [[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],\n])\n\n# Apply the buffer method to the MultiLineString object.\nmultilinestring_buffer = multilinestring.buffer(distance=100)\n\n# Print the result.\ndisplay('multilinestring.buffer(...) =', multilinestring_buffer)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'\n)\nm.add_layer(\n multilinestring_buffer,\n {'color': 'red'},\n 'Result [red]: multilinestring.buffer',\n)\nm\n```"]]